Past and PresentPilot TenderTrinity House Pilot Vessels

THPV (20) Preceder – Past and Present

IMO Number: 5283669 

MV Investigador I

ex Invetigador, Investigador I, THPV (20) Preceder

© A G Jones

© A G Jones

Steel single screw motor vessel, built in 1961 by Brooke Marine, Lowestoft (Yard No. 284), for Corporation of Trinity House as a Pilot Tender.

Technical Data

  • Length: 125.0 ft (between perpendiculars), 139.0 ft (overall)
  • Breadth of hull: 24.1 ft (extreme), 24.0 ft (moulded)
  • Depth: 13.0 ft
  • Draught: 11.6 ft (aft, loaded), 6.6 ft (forward, loaded)
  • Tonnage: 334.53 gross/79.95 net/430.00 deadweight
  • Load Displacement: 430 tons
  • Engines: 2 x 4SA 6-cylinder Lister Blackstone diesels
  • Fuel: Gas Oil
  • Power: 990 bhp/750 rpm
  • Speed: 13.314 knots (full trial), 12.75 knots (working)
  • Radar: Decca 303
  • Capacity of Tanks or Bunkers: 52 tons
  • Consumption per 24 hrs: 4.5 tons (Full Speed)/1.37 tons (Station Working Speed)
  • Fresh Water Capacity: 22 tons
  • Ballast Tanks: 15 tons
  • Cable: 1”
  • Anchors: 4 (Number),9,9.7¼, 3 cwt (Size)
  • Voltage: 220
  • Capacity: 6 officers, 12 crew
  • Sleeping accommodation: 12
  • Call Sign: MENQ, HO6765, EAJO
  • IMO Number: 5283669 
  • Official Number: 302882
  • Registry: London/UK 🇬🇧, Panama 🇵🇦, Las Palmas/Spain 🇪🇸
  • Sister-ship: Patrol (283)


August 28th 1961: Launched to Corporation of Trinity House as PROCEDER.

© Ted Ingham © Ted Ingham  

© Ted Ingham

1982: Renamed PRECEDER I.

1982: Renamed CEDER. Registered Owner: Latam Shipping S.A.

1987: Renamed INVESTIGADOR-S

1992: Registered Owner: Compania de Investigaciones Marinas S.A. Renamed INVESTIGADOR

1993: Converted to a Hospital Ship and renamed INVESTIGADOR I

© Santi

© Santi

2007: Renamed INVESTIGADOR.

© Prieto

© Prieto

© Mike Barker

© Mike Barker (Almeria 10/03/2016)

2022: Still active.

© Manuel Hernández Lafuente

🆕 © Manuel Hernández Lafuente (Sagunto, Spain 05/03/2022)

All information is believed to be correct and no responsibility is accepted for any errors or omissions. All items included in this article are subject to © copyright. We would like to take this opportunity of thanking: Mike Barker, Ted Ingham, A G Jones, Neil Jones (Trinity House Archives), Manuel Hernández Lafuente, Prieto, Santi and Andy C Adams for their assistance in producing this feature.

Article © Nigel Thornton and Ray Goodfellow (Dover Ferry Photos Group)


  1. I would very much like to make a scale model of either the THPV Preceder or her sister THPV Patrol. Any idea where I could get a general arrangement drawing?

    I have tried contacting the Lowestoft Maritime museum but they could not help and Brook Marine are no longer trading.

    Thanks in advance

    David Hathaway

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